DLZ is a transportation engineering leader, having studied, planned, and designed more than 500 roundabouts, 1,000 bridges, and numerous roadway widening projects across the Midwest. As a full-service professional firm, DLZ also provides drilling, surveying, right-of-way acquisition, construction management/inspection (CM/CI), and materials testing services. Headquartered in Columbus, Ohio, DLZ was founded as a water resources and civil engineering firm and has grown over more than 100 years into a nationally recognized architecture, engineering, and construction services firm. We are dedicated to delivering practical solutions that save clients money, improve operations, and solve complex challenges.